Container and method of making the same



. Sept. 25, 1928. I

A. M. SCAIFE CONTAINER AND METHOD OF MAKING THE SAME Filed June 1. 1927 2 Sheets-Sheet 1 'INVENTOR hay-W Sept. 25, 1928. v 1,685,246 A. M. SCAIFE CONTAINER AND METHOD OF MAKING THE SAME Filed June 1,1927 2 Sheets-Sheet 2 11111111111111. VII!!! VI'IIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIII4 Q l3 \\uuu\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ Illl VIIIIIIJI'IIIIIIIIIIIIIIIIIIIIIIII FIG 4 I INVENTOR Patented Sept. 25, 1928.

UNITED STATES PATENT O mu. some, or rrrrsnunen, PENNSYLVANIA, assrenon TO WM. 28. scum a SONS COMPANY, A CORPORATION OF PENNSYLVANIA.

commas, AND mn'rnon or AKING THE smn.

Application filed June 1,

This invention relates to brazed tanks or containers and to methods of making the same.

Brazed containers, such, for example, as those employed for storage of liquid or gas under pressure are generally formed from a piece of flat stock which. is first cut to size and then bent to tubular form. The edges, thus brought into engagement, are positioned one over the other to form a lap joint, and are temporarily held together by any desired means such, for example, as stitch riveting, spot welding or other means. The lap oint is sheet from which a then brazed together on a brazing fire of suitable, arrangement. The spot welding or other manner 0 temporaril securing the skelp dges together is mere y for the purpose of o ding such edges forming the longitudinaljoint of the sheet in proper position with relation to each other and to prevent distortion thereof during the brazing operation, in order to provide a uniform space throughout the entire joint for receiving the brazing material. If the lapped edges were not temporarily secured together in some manner, the intense heat of the brazing fire would distort or warp these edges to such an extent as to prevent the roper fusing of the brazing material into the joint.

An object of this invention is to provide an improved longitudinal seam construction for tanks and containers, together with a method of making the. same.

A further object is to provide a tank of such construction and arrangement as to eliminate the necessit of providing lap joints between the edges 0 the sheet.

A stlll further object is to provide an improved tank construction which will be attractive in appearance, rugged in construction and simple and cheap to manufacture.

These and other objects which will be apparent to those skilled in this particular art are accomplished b means of the present invention, one embo iment of which is illustrated in the accompanying drawings, in which Figure 1 is a erspe'ctive view of a flat nished tank is ultimate- 1 formed. Fig. 2 is a similar view of a partially formed tank during the course of manufacture. Fig. 3 is a sectional View through one end of a finished tank provided with a convex end wall or top flange. Fig. 4 is a view similar to Fig. 3' showing a concave end 1927. I Serial N01. 195,645.

wall or bottom flange, and Fig. 5 is an elevation of one end of the interior of a partially formed tank illustrating the butt joint strap member swaged out to receive an end wall.

In the particular embodiment of this invention which has been chosen for the pur- Epses of illustration, a piece of flat stock 5 is st cut to size. This is then formed into a tubular shell having the edges 7 positioned in tion of a tight, smooth joint between such walls and the container propenlthe ends of the strap member 8 are swaged out to form thin flattened portions 10 as shown in Figs. 3 to 5. This ma be done either before or after the strap mem er is assembled in the tubular sheet. The parts are then subjected to a brazing operation wherein the intervening surfaces between the edges of the shell and between each edge and the strap are filled up with brazing material and the parts united to form abutt joint extending longitudinally from one end of the tank to the other. End

walls, such as the concave end wall 11 or convex end wall 12 are inserted in the ends of the tank and are secured in place by brazing in the usual manner. If desired, the strap member 8 may be extended beyond the ends of the shell to assist the insertion of the end walls therein, in somewhat the manner of a shoe horn. I

Attention is directed to the fact that the manufacture of a tank having a longitudinal seam formed by a butt joint provided witha longitudinally extending strap such as the strap member 8 eliminates the necessity of swaging the ends of the shell for the reception of the end walls as has heretofore been the case. The swaging of thestrap member '8 alone suflices to insure a tight joint between the end walls and the tank properand the expense of manufacture is thus conslderabl 'reduced. Also the provision of a butt oint eliminates the necessity of allowing suflicient the present invention rovides a tank in which all longitudinal ap joints or seams have been eliminated so that the exterior of the finished article is smooth'and apparently seamless. 1

What I claim as new and desire to secure by Letters Patent is:

1. A tank havin a longitudinally-extending seam formed abutting edges of the tank and an interior Yongitudinally-extending strap member brazed to each other, the ends of said strap being swa ged to form inclined faces at one side of the tank only to permit the ready insertion of the tank heads.

2. A tank havin a longitudinally-extending seam formed y abutting edges of the tank and an interior 1ongitudinally-extend-' ing strap member brazed to each other, the

ends of said strap member being swaged to; 2o spread the material beyond the normal width- -scribed my of the strap and forming inclined surfacesto permit theready insertion of the tank heads. 3. The method of making a cylindrical metal vessel having a longitudinal joint interiorly reinforced, consisting in' cutting a sheet metal blank to bring its longitudinal edges together in"v abutting relationship, then inserting a reinforcing metal stri having flattened ends onsaid seam, sai stripl bridging the seam and running the full lengt of the vessel, initially fastening together the adjacent .faces of the strip and the vessel on both sides of the seam and throughout the length of the seam in such a manner as to prevent the intense heat of the subsequent brazing operation from distorting or warping the strip, and finally br'azin the parts together. In testimony whereof, have hereunto subname this 27th da of May, 1927.

ALAN SCAIFE 

